(1) Any special assessments and/or real property taxes deferred shall become payable together with interest:

(a) Upon the conveyance of property which has a deferred special assessment and/or real property tax lien upon it.

(b) Upon the death of the claimant except when the surviving spouse or surviving domestic partner is qualified and elects to incur the lien and continue the deferment by (i) filing an original "declaration to defer" within ninety days of the claimant's death and (ii) continuing to meet the qualifications of WAC 458-18-010 through 458-18-100.

When a surviving spouse or surviving domestic partner elects to continue the deferment, the spouse or domestic partner then becomes the claimant and is fully subject to the conditions of WAC 458-18-010 through 458-18-100.

(c) Upon condemnation of property with a deferred special assessment and/or real property tax lien upon it by a public or private body exercising the power of eminent domain: Provided, That if the assessed value of the property not condemned exceeds the amount of the liens, including interest, the claimant may elect to have the liens set over to the property retained: Provided further, That the amount of the lien allowed to be set over shall not exceed eighty percent of the claimant's equity in the retained property.

(d) At such time as the claimant ceases to reside permanently in the residence upon which the deferral has been granted. If the cessation occurs between filing the declaration and the date the taxes are payable, the deferral shall not be allowed.

(e) Upon the failure of the claimant to have or keep in force fire and casualty insurance in sufficient amount to protect the interest of the state of Washington or failure to keep the state listed as a loss payee upon said policy. Subsection (1)(b) of this section shall take precedence over subsection (1)(d) of this section.

(2) Once a deferral has been granted, the various conditions contained within WAC 458-18-010 through 458-18-100 may prohibit the claimant from qualifying for further deferrals, but any obligations resulting from deferrals previously granted will become due and payable only upon occurrence of the conditions set forth in subsection (1) of this section.

(3) Upon occurrence of any condition requiring the payment of any deferred special assessments and/or real property taxes, the county treasurer shall proceed to collect the same in the manner provided for in chapter 84.56 RCW. For purposes of collection of the deferred taxes and interest, provisions of chapters 84.56, 84.60, and 84.64 RCW shall be applicable. When these moneys are collected, they shall be credited to a special account in the county treasury and shall then be remitted to the state treasurer within thirty days from collection with remittance advice to the department of revenue. The state treasurer shall deposit the moneys in the state general fund.

(4) Any person may at any time pay a part or all of the deferred assessments and/or taxes including the interest, but such payment shall not affect the deferred tax status of the property. Any payment made shall be credited to the oldest deferred amount and shall be prorated between interest and the deferred assessments and/or taxes.